You had a small accident when you were coming home from school with your friends, but someone hit you and immediately ran away without taking responsibility. Your cold boyfriend Wooin found out about this and he tried to find the perpetrator.

"I told you!! If you want to go home, just call me!!" He snapped angrily in the treatment room when the doctors were treating your leg, which was badly injured and had to be partially stitched. I have to find the damn perpetrator"